Type-writing machine.



J. D. DAUGHERTY. TYPE WRITING MACHINE.

APrLIoATIoN FILED 00T1 21, 1905.

J. D. DAUGHERTY.

TYPE WRITING MACHINE.

APPLICATION FILED 0012.21, 1905. 1

1,01 15924, Patented Deo. 19, 1911.

3 sIIETs-SIIHBT 2.

J. D. DAUGHERTY. TYPE WRITING MACHINE.

. AP-Pmouon Hmmv 90T. 21, 1905 `Patented Dec. 19, 1911.

l 3 SHEETS-SHEET 3.

vbeing had therein to the muren s'rnr rnrnnr orrion.

JAMES DENNY DAUGHEBTY, OF KITTANNING, PENNSYLVANIA, ASSIGNOR TQUNIOI'I'v TYPEWRITER COMPANY, A CORPORATION OF NEVI JERSEY.

TYPE-WRITING MACHINE.

Speccation of Letters Patent.

Patented Dee. 19, 1911.1

To all whom it 'may concern:

Be it known that I, JAMES DENNY Danennn'rr, a citizen of the United.States, residing at Kittanning, in the county of Arn-strong and State ofPennsylvania, have invented certain new and useful Improvements inTypeJWriting Machines, of which' the following is a specification,reference l accompanying drawings. lVhile the key of a writingv machineis v depressed at` an approximately'7"'V 'uniform l speed throughoutits'stroke, it 12s-desirable vment, thereby avoiding that the type-barshall start from its position of rest at relatively low speed andin--crease as the-type approaches ther impression surface. Such arrangementinsures rapid action and positive clearance'ofthe In embodying thisprinciple in my improved type-action, I have so l arranged thecooperating key and type-actuating levers that while the keyvlever'is'bei'ng depressgdf the point of engagementbetween the leversshifts in such manner as to moveM the typ-actuating lever-at increasingspeed," As the levers, of the several banks of keys of a writing machinevary in length, their throw varies if a uniform depression is maintainedthroughout the severalv banks. In my iuproved type action thisvariation, as well as variations -in-the throw of the type-actuatinglevers of different' lengths,-`is provided for by varying the shiftingen-I gagement of the cooperating levers.

-A further purpose of the invention is'l t0 provide for holding thecooperating levers in positive engagement at all times withoutinterfering with their independent .movelost motion and preventing thetype-bars. from jumping or -rebounding from their position of rest. y

Still a further purpose is to provideimproved means for mounting thetype-action `levers, one of the advantages incident thereto being thatany lever may he removed and replaced without disturbing the vers.

In the 4accompanfyingdrawings, vFigure 1 is a view in elevation 4of theimproved type action at rest, two key levers, one of the shortest andoneof the longest, being. shown. Fig-2 is asimilar View of a single setfofother le- -edge 3 in engagement with the type-action levers, showingtheposition when making an impression. Fig'. 3- is a rear elevation of thetype-actuating levels and bearing plates. Fig. Lis a detail view' of thesame. Fig. 5 is a face view of one of the bearing plates. Fig. 6 Vis asectional View ofthe mechanism for adjusting and securing the bearingplates. Fig. 7 illustrates a type 'action of modified form.

In the preferred embodiment of the ini vention the key levers are ofbell-crank or angular form, the key arms 2 thereof being' arranged in asuitable number of banks, four being here shown.

3 designates the depending motion-trans mitting arm of'eaoh key lever,having" its rear edge 3 of convex or rocker form, as

shown. l

4 is the -lever-.fulcruml Coperating witheach key lever-is auxiliary ortypejactuating lever or subf lever 5, having fulcrum 6 at its lower 'endand at its upper end connected by link 7.

vwith type-bar 8. The normal position of` the latter is. approximatelyhorizontal, the same being pivoted on segmental rod 9 and arranged tostrike against the front of platen P. Levers 'vary in length, theirupper ends forming a segmental line as; shown in Fig. 3, which iscom'plementary'- with the segment-al "series of type-bars. Each of thelevers 5 is preferably furcated -or bifurcated and has a straight edgecontact-face 5,fwith whichl the curved Contact' of the arm 3 engages,thereby providing -a rocking or rolling contactor ens.

'ga-gement between the two members 3 and 5 of each type action. The sameresult may be secured by curving edge 5 instead of 3'-, or by curvingboth ofsaid edges.. The areV rangement is sud-h that whenA the keylever-l is at rest, the upper portion of" lever-edge 5', lo: that partvfarthest fromfulcrum 6, is rocker edge 3 at a' point which is nearer4fulcrum 4. than at anyother time. During'the depression of the keylever, said point of en, l;age mentl shifts away from fulcrum l andtoward fulcrum 6,' with standing a uniform downward movement of theresult that notwiththe key, lever 5 is actuated at increasing speed, aspeed which isV slowest-When the' type-bar start's'from its position ofrest and mostrapid-When the type is in close prok- .typeactnating.lever-is moved at increasing speed, the point .of contact between theiev'dersgshifting toward the type-actuating lef/l' fulcrumla-nd awayfrom the key lever fulrumjwhile thelatter is being depressed.

fltlnfa'type action, a key lever and a ype-actuating lever botharrranged in the .saine Vgeneral plane and in direct shiftingengagement, one of the levers having an extendedfpart embracing theother lever for holding the levers in constant and positive engagement.i Q

2. 'In a type action, a key lever having a Vprojecting armhatype-actuating lever em- 'bracmg and in positive shifting engagementwith the key lever arm, whereby one lever cannot move independently ofthe other, and a type bar independent of but lactuated by saidtype-actuating lever.

'3. In a'type action, a bell-crank key lever, and atype-actuating leverin shifting engagement with one arm of the key lever between the leverulcrums, the type-actua'e' iiig lever having an extended part embracingsaid key lever arm for holding the levers l1n engagement.

4.. In a type action, a key 'lever and a type-actuating lever inshifting engagement, and an arm extending from the key lever adapted toengage the type-actuating lever l,when the Akey lever is /in the normalposition.

'-5.. In a type. action, a bell-crank key le.

ver `fulcrumed adjacent the juncture of its arms, 'one 'of said armseritendi'ng downwardly, a type-actuating lever in operative engagementwith said downwardly extending arm, and an arm extending rearwardly fromthe key lever fulcrum adapted to interlock with the type actuating leverwhen the levers are in normalposition.

.6. Ina type action, a key lever, atypebar, an, auxiliary leverfulcrumed at one end and at its opposite end operativelyconiiected tothe type-bar and' between its ends in shifting engagement with the keylever,

an arm on the auxiliary lever embracing the key lever, and an arm on thekey lever adapted to interlock with the auxiliary lever when `the keylever is in the normalposition.

7. In a type action a key lever, a typeactuating lever operativelyconnected to the key lever, an arm on the key lever, and anarnbengagingpoint on the type-actuating 1 lever adapted to -be engaged by said arm'a spring connected .at one end to the typeactuating lever and at itsopposite end to vrelaxed to afford the movement on the rods to permitofthe rel0. In a type action, a series of banks, of l key levers,type-actuating levers in rocking engagement with the key levers,the'rocking engagement with the key levers of each bank being differentand depending on the length of the associated actuating levers. ll. In atype action, key levers, type-actuating levers of diiierent lengths inrocking engagement with the key levers, the pitch or curvature lof theengaging members varying with the length of the actuating levers.

l2. In a type action, a series of banks of key levers, each level`having a key arm and a motion transmitting arm, the respective arms ofthe'levers of each bank being of corresponding lengths, said arm lengthsdiffering in the diierent'banks, and typeactuating 'levers in shiftingengagement with 'the motion-transmittingy arms Aof the keyv levers. y

13. In a type action, key levers each having a key arm and a curvedmotion-titansmitting arm, type-actuating levers of different lengths inrocking 'engagement with banks, and type-actuating levers in rockingengagement with said curved motion-transmitting arms, the curvature ofthe latter varying with' the. varying lengthsof typeactuating levers.

l5. In a writing machine, a support, a

'series of spacing members strung thereon,

adjustable securing means common to all the spacing members whereby themembers may be either clamped together or loosened for the separation'of any two adjacent members, and typev action levers mountedv betweenadjacent members and' removable therefrom when the members are loosened.

16. In a writing machine, a frame,.rods therein, a series of platesloosely strung upon the rods, type actionl levers between and removablyfulcrumed to adjacent plates,

means operating when plates sulicient lateral j and plate clamping movalof the levers from between the, plates withoutremoving the plates androds, from the frame. Y

17. In a type action, separable plate-like spacing members, and a keylever and a type-actuating lever in shifting engagement ofthem may beseparated for the 'removal or insertion of a type action lever, and akey lever and its associated type-actuating lever mounted between.adjacent members and adapted to be removably held thereby.

19. In a writing machine, rods, a series of laterally movable bearingmembers mounted side by side on the rods, securing means tor renderingsaid members laterally movable at will, and akey lever and atypeactuating lever between diiierent portions ot adjacent vmembers andremovably fulcrumed thereto. l

Q0. In a writing machine, a frame, titansverse rods \vithin therame,-one higher than the'otherf-upright plates loosely strung upon therods, means for securing the plates, key levers fulcrumed between theupper portions'of the plates, and type-actuating levers ulcrumed betweenthe lower portions of the plates and in operative engagement with thekey levers. j

21. lIn a writing machine, a series of upright combined spacing andbearing members, type-actuating levers ulcrumed between the lowerportions of adjacent members, key levers fulcrumed between the upperportions of adjacent members, each key lever and its associatedtype-actuating lever having cooperating bearing faces of such.

form as to create a rolling contact when the key lever is moved.

22. In a writing machine, a series of upright combined spacing andbearing members, type-actuating levers fulcrumed at their lower endsbetween the lower portions y Aof adjacent members, and bell-crank keylevers fulcrumed between the upper portions oi adjacent members .withanarmor each lever depending between the members, said arm and theassociated type-actuating lever having cooperating faces formed tocreate a rolling contact when the key lever is moved.

28. In a type action, a key lever and a type actuating` lever mounted toswing in the'same plane and 'in direct and constantly positiveinterlocking shitting engagement with each other.

24. Ina writ-ing machine, rods, bearing members movable on the rods,type-action levers between and fulcrumed to adjacent members, sleevesmovable on the rod-ends and projecting therefrom, and` adjusting meansengaging the sleeves.'

- 25. In a writing machine, rods having 1,01 noaa type-actuating leverin direct and constantly positive interlocking engagement, the key leverhaving a rolling contactwith the type actuating lever. l

27. In a type action, a key lever anda type-actuating lever, one of saidlevers having a rolling contact with the other and one of the levershaving an extended part embracing the 'other lever for holding the le- Yvers irl-constant .and positive engagement.

28. In a typewriting machine, the combination of a series ofsub-levers,a series of key levers of ditlerent length having a rollengaging armsvotthekey levers being increased or, decreased proportionately to rtheincrease or 'decrease inthe length of the key4 carrying arms of said keylevers.

29. In a typewriting machine, the combination of a series of uprightsub-levers which are gradually longer as the sides of ving engagementtherewith, the length 'of the l l the system are approached, a series ofcooperating key levers of different lengths engaging said sub-levers,thev length or' the engaging arms of the key levers varyingproportionately with the variation in 'he length of the key vcarryingarms of said levers, and a curved contact face between each pair` ofcooperating levers, the curvature of the contact faces varying accordingto the lengths of the sub-levers to afford a uniform dip of the v.keysand a uniform extent oi' movement of the actuating ends` of thesub-levers. Y y y 30. In a typewritingmachine, the combination of a typebar, a sub-lever, and a key' llever that has a rolling engagementtherewith, said sub-lever having portions that en- Agage the key leveron opposite sides thereof.

.31. In a typewriting machine, the combination of a type bar arranged toswing upwardly and rearwardly, a substantially u'pright Jurcatedsublever pivotally supported at its lower end'md operatively connectedat its upper end to the type bar, and ,a key v lever having asubstantially upright Vpart in contact with the' front side of ,said

sub-lever at the furcated portion thereof and acting to vibrate thesub-lever from its normal position with an accelerated motion.

32. In a typewriting machine, a type-bar 4arranged to swing upwardly andrearwardly, a pivoted upright auxiliary lever operatively connected tothe vtype-bar at its upper end, a key lever having an upright lpart inrolling contact with the auxiliary lever, and means whereby the keylevers' resist the movement of the type bars and auxiliary levers whenthe key levers are at their normal positions. v

33. Ina typewriting machine, a type bar arranged to swing upwardly andrear wardly, a pivoted upright auxiliary lever operatively connected tothe type bar at its. upper end, a pivoted key lever having a 'rockingconnection with the auxiliary lever acting to vibrate the said leverwith an acl celerated motion, and an arm'onone of the -levers bearing.againstftheother lever to l'limit the reboundof the type bar when it.

Y g returns to its normal position.

. :34. `In a typewritingmachine, a type' bar .arranged to swing upwardlyand rearwardly, a horizontal-key lever pivot-ally supported at its rearend', and having a Y pendant arm adjacentthe pivot, and au auxiliarylever pivot-ally supported at -its .lower end having two arms, one ofsaid arms 4forming a point of contact with the front of the pendantarm,lthe other arm of the auxiliary lever forming a rocking Contact withthe 'rear of .the pendant arm and extending upwardly inoperativeconnection .with the type bar.

l 35. In a typewriting machine, a series of 'type barsarranged to swingupwardly and rearwardly, of a series of upright pivotally supportedauxiliary levers of graduated lengths operatively connected to the typebars, and a series of pivotally 'supported key levers of differentlengths having upright parts in rocking contact with their auxiliarylevers, the rocking parts being of different form to equalize the travelof the .upper ends of the auxiliary levers.

.3 6.`In a. typewriting machine, a series of type bars arrangedto swingupwardly and rearwardly, a4 series of upright pivotally supportedauxiliary levers of graduated lengths operatively connected to thetype.-

bars, and a series of pivotally supported key levers' of differentlengths'having upright parts in rocking contact with the 'auxiliarylevers, the rocking parts acting pivota-llymounted type bar, a sub-levercone` nec'ted with the type-bar, a key operated lever adapted to engagethe sub-lever at successive points as it -is operated, and a springconnecting the sub-lever and key op. erate-d lever;4 v

In testimony whereof I ax my signature iin presence of twowitnesses.

JAMES DENNY DAUGI-IERTY.

Witnesses ISAAC MILLER, JAMES H. MCCAIN.

